For toddlers who's turning 2 years old, what summer class would you recommend?

I recommend Ready, Steady, Go Kids. It's a sports and exercise class. Really fun. If you sign up, be prepared that you, too, will be doing some sports and exercise with your kid. When I signed up, I was all dolled up with full makeup on and thought I could just leave my kid with the instructors. But no.... she wanted mommy to be with her the entire time. So I was hopping like a kangaroo and doing jumping jacks with her - and washed off my makeup with sweat. haha :)